/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.dubbo.config.builders;

import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.config.AbstractConfig;

import java.util.HashMap;
import java.util.Map;

/**
 * AbstractBuilder
 *
 * @since 2.7
 */
public abstract class AbstractBuilder<T extends AbstractConfig, B extends AbstractBuilder> {

  /**
   * The config id
   */
  protected String id;
  protected String prefix;

  protected B id(String id) {
    this.id = id;
    return getThis();
  }

  protected B prefix(String prefix) {
    this.prefix = prefix;
    return getThis();
  }

  protected abstract B getThis();

  protected static Map<String, String> appendParameter(Map<String, String> parameters, String key,
      String value) {
    if (parameters == null) {
      parameters = new HashMap<>();
    }
    parameters.put(key, value);
    return parameters;
  }

  protected static Map<String, String> appendParameters(Map<String, String> parameters,
      Map<String, String> appendParameters) {
    if (parameters == null) {
      parameters = new HashMap<>();
    }
    parameters.putAll(appendParameters);
    return parameters;
  }

  protected void build(T instance) {
    if (!StringUtils.isEmpty(id)) {
      instance.setId(id);
    }
    if (!StringUtils.isEmpty(prefix)) {
      instance.setPrefix(prefix);
    }
  }
}
